Starter quiz
- Match the processes to their definition.
- erosion⇔The wearing away of pieces of rock, soil or other solid materials ✓
- deposition⇔When material is deposited or left behind ✓
- transportation⇔To move objects or people from one place to another ✓
- weathering⇔The breaking down of rocks in-situ ✓
- What is a glacier?
- A large body of water that flows over land
- A large mass of ice that moves slowly over land ✓
- A type of rock formed by volcanic activity
- A landform created by wind erosion
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- What is freeze-thaw weathering?
- The break-up of rocks caused by water regularly freezing and thawing ✓
- The movement of rock from one place to another
- A large mass of ice that moves slowly over land
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- The last ______ in the UK took place around 18 000 years ago. During this time, temperatures remained low throughout the year and ice sheets and glaciers covered the north of the UK.
- 'ice age' ✓
- Glacial erosion is very powerful and has a range of effects, including:
- Deepening valleys ✓
- Creating wave cut platforms
- Widening existing V-shaped river valleys into U-shaped valleys ✓
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- Glaciers move slowly, transporting material called glacial ______ in different ways depending on its position within the ice.
- 'till' ✓
Exit quiz
- Match the key words to their definitions.
- plucking⇔a glacier pulls chunks of rock from the bedrock as it moves over it ✓
- abrasion⇔rocks and debris carried by a glacier scrape and wear away rock ✓
- glacial trough⇔a valley reshaped by glacial erosion into a U-shape ✓
- moraine⇔an accumulation of unsorted debris, deposited by a glacier ✓
- A ______ is a bowl-shaped hollow found on the upper slopes of glaciated valleys, often containing a small lake (tarn/cwm) after glaciation.
- 'corrie' ✓
- How does a corrie form?
- 1⇔Snow collects in a sheltered hollow on the side of a mountain. The snow doesn't
- 2⇔melt in the summer because it is high up, sheltered and cold. Every winter, more
- 3⇔snow collects in the hollow. This is compacted to ice. The back wall of the
- 4⇔corrie gets steeper due to freeze-thaw weathering and plucking. The base of
- 5⇔the corrie becomes deeper due to abrasion. Rotational slip increase erosion at
- 6⇔the base of the corrie. At the front of the corrie, erosion decreases
- 7⇔and a rock lip forms. After the glacier has melted a lake forms in the hollow.
- Which of the following are glacial landforms created by deposition?
- hanging valleys
- drumlins ✓
- moraines ✓
- erratics ✓
- arête
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Worksheet
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Lesson Details
Key learning points
- Glacial landscapes exhibit several distinctive landforms.
- Distinctive landforms formed due to erosion including corries, aretes, pyramidal peaks, truncated spurs, glacial troughs
- Distinctive landforms formed due to processes of transportation and deposition include erratics, drumlins and moraine.
Common misconception
Glacial erosion is the only process that creates new landscapes.
Glacial erosion does create new landforms, but as glaciers transport and then deposit the eroded material, this also creates new landscapes.
Keywords
Plucking - when a glacier pulls chunks of rock from the bedrock as it moves over it
Abrasion - when rocks and debris carried by a glacier scrape and wear away the surface beneath it
Glacial trough - a valley reshaped by glacial erosion into a U-shape
Moraine - accumulation of unsorted debris, such as soil and rock, deposited by a glacier
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